Listen to the concert preview. For this first of two weeks celebrating Charles Dutoit's 80th birthday, the eminent Swiss conductor-who is also continuing a close, multi-season collaboration with the BSO-is joined by Yo-Yo Ma for Edward Elgar's substantial and popular Cello Concerto. The program of works by three 20th-century English composers opens with William Walton's Portsmouth Point Overture, a vibrant and jazzy early work inspired by a print of colorful activity at a seaport. Written between 1914 and 1916, Gustav Holst's astrologically inspired The Planets is by far his most enduringly popular work, a series of orchestrally rich character pieces, from fleet Mercury to mysterious Neptune.